<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        div{
            width: 100px;
            height: 100px;
        }
        #box{
            background-color: aquamarine;
            margin-bottom: 30px;
            box-shadow: 5px 5px 25px red;
        }
        #box2{
            background-color: blueviolet;
            margin-top: 10px
        }
        #box3{
            width: 300px;
            background-color: beige;
            margin-top: 20px;
            border: solid 1px red;
        }
        #box4{
            width: 200px;
            background-color: bisque;
            margin-top: 10px;
            border: solid 1px red;
            padding: 10px;
        }
    </style>
</head>
<body>
    <div id="box">

    </div>
    <div id="box2">

    </div>
    <div id="box3">
        <div id="box4">

        </div>
    </div>
</body>
</html>